Counterfactuals Causal inference is easier when the effects are large and sudden. The COVID-19 pandemic and accompanying policy measures caused economic disruption so stark that sophisticated statistical approaches were unnecessary for many questions. For example, unemployment jumped sharply in the early weeks of the pandemic, leaving little room for alternative explanations.
“我们愿意将经验和成果无偿分享给上合组织伙伴。”宁光告诉记者。
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